Title: 
SPPQ and the Development of the State Politics Field

Authors: 
Michael Berkman, Professor, Penn State University, mbb1@psu.edu
Morrgan T. Herlihy, PhD Candidate, Penn State University, mth5492@psu.edu
Michael J. Nelson, Professor, Penn State University, mjn15@psu.edu

Compute Environment:
Operating System: macOS Sequoia
Statistical Software: R version 4.3.1 (2023-06-16)
Estimated run time for all analyses: 10 minutes
Packages used in analysis: dplyr; tidyr; tibble; purrr; ggplot2; stringr; quanteda; scales

List of Files:
Data Files
FourJournals_FINAL.csv this is the main analysis dataset for all articles from the Top Three journals (JOP, APSR, and AJPS) as well as SPPQ
SPPC_FINAL.csv  this is the .main analysis dataset for all the SPPC presentation papers from 2002 to 2025

Code
SPPQ_StatePoliticsSubfieldAnniversaryIssue_ReplicationCode.R uses FourJournals_FINAL.csv and SPPC_FINAL.csv to construct all figures, tables, and statistics in the main analysis  

Documentation
readme.txt this file, which lists all files and compute environment dependencies necessary to verify the results from this manuscript
Codebook.pdf  codebook for FourJournals_FINAL.csv and SPPC_FINAL.csv, the analysis dataset used to generate results
from this manuscript